Interior surface for a squash court



FIG. 1 is a perspective view of an interior surface for a squash court showing my new design;

FIG. 2 is an elevational view of the portion of my design on the front wall thereof;

FIG. 3 is an elevational view of the portion of my design on the right-hand side wall thereof, the design on the left-hand side wall thereof being a mirror image of the design on the right-hand side wall; and,

FIG. 4 is a top plan view of the portion of my design on the floor thereof. 

The ornamental design for an interior surface for a squash court, as shown and described. 